Controlling the wettability of plastic by thermally embedding coated aluminium oxide nanoparticles into the surface

Hill, Donald; Barron, Andrew; Alexander, Shirin

doi:10.1016/j.jcis.2020.01.116

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Controlling the wettability of plastic by thermally embedding coated aluminium oxide nanoparticles into the surface

Donald Hill

, Andrew Barron, Shirin Alexander

Journal of Colloid and Interface Science, Volume: 567, Pages: 45 - 53

Swansea University Authors: Donald Hill , Andrew Barron, Shirin Alexander

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DOI (Published version): 10.1016/j.jcis.2020.01.116

Abstract

HypothesisNanoparticle embedding into the surface of plastics provides an effective anchor that improves the durability of coatings formed from functionalized nanoparticles. Coatings formed from thermally embedded particles show superior wear resistance relative to coatings formed from non-embedded...

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Published in:	Journal of Colloid and Interface Science
ISSN:	0021-9797
Published:	Elsevier BV 2020
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa53397

first_indexed	2020-01-30T19:45:49Z
last_indexed	2022-04-28T03:20:48Z
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Coatings formed from thermally embedded particles show superior wear resistance relative to coatings formed from non-embedded particles. As a consequence of this, embedded nanoparticles functionalized with hydrophilic and hydrophobic carboxylates are better suited for controlling the wettability of plastics than when the nanoparticles are deposited onto the plastic under ambient conditions.ExperimentsCarboxylate-functionalized Al2O3 nanoparticles were embedded into ethylene vinyl acetate through spray coating the particles onto the substrate during heating. Sonication was used to remove excess particles that did not become embedded into the material. Coatings formed from the embedded particles were characterized through scanning electron microscopy (SEM), atomic force microscopy (AFM), energy dispersive X-ray spectroscopy (EDX), and X-ray photoelectron spectroscopy (XPS). The wettability of the coatings was characterized using static and dynamic contact angle (CA) measurements to measure the apparent water contact angles, and sliding angle measurements, whilst the durability of the coatings was studied using scratch testing, tape peel tests, and abrasion tests. The build-up of fog on the substrates was also studied through exposing the surfaces to water vapour.FindingsThermal embedding of the particles into the surface of the plastic was observed to occur when the material was heated to temperatures around its melting temperature. AFM and SEM showed that plastic embedded with the nanoparticles possessed a morphology that was substantially rougher than the untreated plastic. CA measurements showed that plastic embedded with hydrophobic isostearate functionalized nanoparticles was highly hydrophobic and displayed a CA of approximately 152°. Dynamic CA measurements and sliding angle measurements revealed that plastic embedded with the isostearate functionalized nanoparticles showed petal-like wetting behavior. Furthermore, it was observed that the CA of the plastic could be varied from highly hydrophobic to highly hydrophilic through embedding varying amounts of isostearate and hydrophilic 2-[2-(2-methoxyethoxy)ethoxy]acetate functionalized Al2O3 nanoparticles into the surface of the material. Scratch testing showed that thermally embedding the nanoparticles into the plastic substantially improved their abrasion resistance, relative to when the nanoparticles are deposited onto the non-heated material. This methodology indicates that embedding nanoparticles into plastics creates durable coatings that can display variable wettability. 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spelling	2022-04-27T12:15:26.9990463 v2 53397 2020-01-30 Controlling the wettability of plastic by thermally embedding coated aluminium oxide nanoparticles into the surface d542c5f6c548c25ef4ab7cb51ee71650 0000-0002-3457-5895 Donald Hill Donald Hill true false 92e452f20936d688d36f91c78574241d Andrew Barron Andrew Barron true false 0773cc55f7caf77817be08806b8b7497 0000-0002-4404-0026 Shirin Alexander Shirin Alexander true false 2020-01-30 EAAS HypothesisNanoparticle embedding into the surface of plastics provides an effective anchor that improves the durability of coatings formed from functionalized nanoparticles. Coatings formed from thermally embedded particles show superior wear resistance relative to coatings formed from non-embedded particles. As a consequence of this, embedded nanoparticles functionalized with hydrophilic and hydrophobic carboxylates are better suited for controlling the wettability of plastics than when the nanoparticles are deposited onto the plastic under ambient conditions.ExperimentsCarboxylate-functionalized Al2O3 nanoparticles were embedded into ethylene vinyl acetate through spray coating the particles onto the substrate during heating. Sonication was used to remove excess particles that did not become embedded into the material. Coatings formed from the embedded particles were characterized through scanning electron microscopy (SEM), atomic force microscopy (AFM), energy dispersive X-ray spectroscopy (EDX), and X-ray photoelectron spectroscopy (XPS). The wettability of the coatings was characterized using static and dynamic contact angle (CA) measurements to measure the apparent water contact angles, and sliding angle measurements, whilst the durability of the coatings was studied using scratch testing, tape peel tests, and abrasion tests. The build-up of fog on the substrates was also studied through exposing the surfaces to water vapour.FindingsThermal embedding of the particles into the surface of the plastic was observed to occur when the material was heated to temperatures around its melting temperature. AFM and SEM showed that plastic embedded with the nanoparticles possessed a morphology that was substantially rougher than the untreated plastic. CA measurements showed that plastic embedded with hydrophobic isostearate functionalized nanoparticles was highly hydrophobic and displayed a CA of approximately 152°. Dynamic CA measurements and sliding angle measurements revealed that plastic embedded with the isostearate functionalized nanoparticles showed petal-like wetting behavior. Furthermore, it was observed that the CA of the plastic could be varied from highly hydrophobic to highly hydrophilic through embedding varying amounts of isostearate and hydrophilic 2-[2-(2-methoxyethoxy)ethoxy]acetate functionalized Al2O3 nanoparticles into the surface of the material. Scratch testing showed that thermally embedding the nanoparticles into the plastic substantially improved their abrasion resistance, relative to when the nanoparticles are deposited onto the non-heated material. This methodology indicates that embedding nanoparticles into plastics creates durable coatings that can display variable wettability. Consequently, this methodology could be useful in applications where it is desirable to keep plastics dry, such as for food packaging or medical devices. Journal Article Journal of Colloid and Interface Science 567 45 53 Elsevier BV 0021-9797 Superhydrophobic surfaces; Nanoparticles; Durable; Branched carboxylic acid; Al2O3; Thermal embedding 1 5 2020 2020-05-01 10.1016/j.jcis.2020.01.116 COLLEGE NANME Engineering and Applied Sciences School COLLEGE CODE EAAS Swansea University 2022-04-27T12:15:26.9990463 2020-01-30T14:27:35.5156673 Professional Services ISS - Uncategorised Donald Hill 0000-0002-3457-5895 1 Andrew Barron 2 Shirin Alexander 0000-0002-4404-0026 3 53397__16486__f527bd4b09ba489581dcd1627872c5a4.pdf hill2020.pdf 2020-01-30T14:29:02.1005633 Output 1353611 application/pdf Accepted Manuscript true 2021-01-30T00:00:00.0000000 Released under the terms of a Creative Commons Attribution Non-Commercial No Derivatives License (CC-BY-NC-ND). true eng
title	Controlling the wettability of plastic by thermally embedding coated aluminium oxide nanoparticles into the surface
spellingShingle	Controlling the wettability of plastic by thermally embedding coated aluminium oxide nanoparticles into the surface Donald Hill Andrew Barron Shirin Alexander
title_short	Controlling the wettability of plastic by thermally embedding coated aluminium oxide nanoparticles into the surface
title_full	Controlling the wettability of plastic by thermally embedding coated aluminium oxide nanoparticles into the surface
title_fullStr	Controlling the wettability of plastic by thermally embedding coated aluminium oxide nanoparticles into the surface
title_full_unstemmed	Controlling the wettability of plastic by thermally embedding coated aluminium oxide nanoparticles into the surface
title_sort	Controlling the wettability of plastic by thermally embedding coated aluminium oxide nanoparticles into the surface
author_id_str_mv	d542c5f6c548c25ef4ab7cb51ee71650 92e452f20936d688d36f91c78574241d 0773cc55f7caf77817be08806b8b7497
author_id_fullname_str_mv	d542c5f6c548c25ef4ab7cb51ee71650_*_Donald Hill 92e452f20936d688d36f91c78574241d__Andrew Barron 0773cc55f7caf77817be08806b8b7497_**_Shirin Alexander
author	Donald Hill Andrew Barron Shirin Alexander
author2	Donald Hill Andrew Barron Shirin Alexander
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container_start_page	45
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issn	0021-9797
doi_str_mv	10.1016/j.jcis.2020.01.116
publisher	Elsevier BV
college_str	Professional Services
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hierarchy_top_title	Professional Services
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description	HypothesisNanoparticle embedding into the surface of plastics provides an effective anchor that improves the durability of coatings formed from functionalized nanoparticles. Coatings formed from thermally embedded particles show superior wear resistance relative to coatings formed from non-embedded particles. As a consequence of this, embedded nanoparticles functionalized with hydrophilic and hydrophobic carboxylates are better suited for controlling the wettability of plastics than when the nanoparticles are deposited onto the plastic under ambient conditions.ExperimentsCarboxylate-functionalized Al2O3 nanoparticles were embedded into ethylene vinyl acetate through spray coating the particles onto the substrate during heating. Sonication was used to remove excess particles that did not become embedded into the material. Coatings formed from the embedded particles were characterized through scanning electron microscopy (SEM), atomic force microscopy (AFM), energy dispersive X-ray spectroscopy (EDX), and X-ray photoelectron spectroscopy (XPS). The wettability of the coatings was characterized using static and dynamic contact angle (CA) measurements to measure the apparent water contact angles, and sliding angle measurements, whilst the durability of the coatings was studied using scratch testing, tape peel tests, and abrasion tests. The build-up of fog on the substrates was also studied through exposing the surfaces to water vapour.FindingsThermal embedding of the particles into the surface of the plastic was observed to occur when the material was heated to temperatures around its melting temperature. AFM and SEM showed that plastic embedded with the nanoparticles possessed a morphology that was substantially rougher than the untreated plastic. CA measurements showed that plastic embedded with hydrophobic isostearate functionalized nanoparticles was highly hydrophobic and displayed a CA of approximately 152°. Dynamic CA measurements and sliding angle measurements revealed that plastic embedded with the isostearate functionalized nanoparticles showed petal-like wetting behavior. Furthermore, it was observed that the CA of the plastic could be varied from highly hydrophobic to highly hydrophilic through embedding varying amounts of isostearate and hydrophilic 2-[2-(2-methoxyethoxy)ethoxy]acetate functionalized Al2O3 nanoparticles into the surface of the material. Scratch testing showed that thermally embedding the nanoparticles into the plastic substantially improved their abrasion resistance, relative to when the nanoparticles are deposited onto the non-heated material. This methodology indicates that embedding nanoparticles into plastics creates durable coatings that can display variable wettability. Consequently, this methodology could be useful in applications where it is desirable to keep plastics dry, such as for food packaging or medical devices.
published_date	2020-05-01T19:51:48Z
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Controlling the wettability of plastic by thermally embedding coated aluminium oxide nanoparticles into the surface

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